使用node.js在mongodB中删除数组的路由

npm install express mongodb

const express = require('express');
const router = express.Router();
const MongoClient = require('mongodb').MongoClient;

const url = 'mongodb://localhost:27017'; // MongoDB连接URL
const dbName = 'your-database-name'; // 数据库名称
const collectionName = 'your-collection-name'; // 集合名称

// 创建MongoDB连接
MongoClient.connect(url, { useNewUrlParser: true, useUnifiedTopology: true }, (err, client) => {
  if (err) throw err;
  
  const db = client.db(dbName);
  const collection = db.collection(collectionName);
  
  // 在这里编写删除数组的逻辑
});

router.delete('/', (req, res) => {
  const { arrayId, element } = req.body; // 从请求体中获取数组ID和要删除的元素
  
  // 在这里编写删除数组的逻辑
});

collection.updateOne(
  { _id: arrayId }, // 数组的ID
  { $pull: { arrayField: element } }, // 要删除的元素
  (err, result) => {
    if (err) throw err;
    
    res.send('Array element deleted successfully');
  }
);

module.exports = router;

const express = require('express');
const app = express();
const deleteArrayRouter = require('./routes/deleteArray');

app.use(express.json());
app.use('/deleteArray', deleteArrayRouter);

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});